@marioslab/ulang-vm
Version:
Virtual machine & assembler for recreational programming like it's 1992.
3 lines (2 loc) • 23.3 kB
JavaScript
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a},file:()=>J(e+36),addressToLine:()=>{let a=[],t=m(e+40),u=m(e+44);for(let s=0;s<u;s++)a.push(m(t)),t+=4;return a},free:()=>{_t(e),S(e)}}}function Se(e){return{ptr:e,b:()=>we(e),s:()=>Ae(e),i:()=>x(e),ui:()=>m(e),f:()=>Lt(e)}}function Ot(e){return{ptr:e,registers:()=>{let a=[],t=e;for(let u=0;u<16;u++)a.push(Se(t)),t+=4;return a},memory:()=>new DataView(o.HEAPU8,m(e+64),m(e+68)),memoryPtr:()=>m(e+64),error:()=>Bt(m(e+1096)),program:()=>Dt(m(e+1128)),setSyscall:(a,t)=>{a<0||a>255||Et(e+72+a*4,t)},step:()=>ht(e)!=0,stepN:a=>gt(e,a)!=0,stepNBP:(a,t,u)=>vt(e,a,t,u),print:()=>dt(e),popInt:()=>yt(e),popUint:()=>bt(e),popFloat:()=>wt(e),pushInt:a=>At(e,a),pushUint:a=>Tt(e,a),pushFloat:a=>Rt(e,a),free:()=>{St(e),S(e)}}}function Vt(e){return G(e)}function W(e){return G(Ut(e))}function Mt(e){return S(e)}function Ue(){ut()}function Ee(e,a){let t=o.allocateUTF8(e),u=o.allocateUTF8(a),s=W(0);return lt(t,u,s),o._free(t),o._free(u),J(s)}function Le(){return Bt(W(1))}function He(){return Dt(W(2))}function Pt(e){let a=Le(),t=Ee("source",e),u=He(),s={error:a,file:t,program:u,free:()=>{u.free(),t.free(),a.free()}};return ct(s.file.ptr,s.program.ptr,s.error.ptr),s}function Ce(e){let a=Ot(W(3));return mt(a.ptr,e.ptr),a}var qn=1024*1024*32,Wt=(e=>(e[e.Stopped=0]="Stopped",e[e.Running=1]="Running",e[e.Paused=2]="Paused",e))(Wt||{}),Nt=(e=>(e[e.None=0]="None",e[e.Info=1]="Info",e))(Nt||{}),Xt=class{constructor(e){this.state=0,this.compilerResult=null,this.vmStart=0,this.executedInstructions=0,this.vsyncHit=!1,this.debugSyscallHit=!1,this.breakpoints=[],this.bpPtr=0,this.numBps=0,this.syscallHandlerPtr=0,this.lastStepHitBreakpoint=!1,this.stateChangeListener=null,this.logLevel=1,this.mouseX=0,this.mouseY=0,this.mouseButtonDown=!1,this.keys=new Map,this.listeners=[],typeof e=="string"?this.canvas=document.getElementById(e):this.canvas=e,this.rgbaFramePtr=Vt(320*240*4),this.addEventListener("mousemove",t=>{var u=this.canvas.getBoundingClientRect();this.mouseX=(t.clientX-u.left)/this.canvas.clientWidth*320|0,this.mouseY=(t.clientY-u.top)/this.canvas.clientHeight*240|0}),this.addEventListener("mousedown",t=>{var u=this.canvas.getBoundingClientRect();this.mouseX=(t.clientX-u.left)/this.canvas.clientWidth*320|0,this.mouseY=(t.clientY-u.top)/this.canvas.clientHeight*240|0,this.mouseButtonDown=!0}),this.addEventListener("mouseup",t=>{var u=this.canvas.getBoundingClientRect();this.mouseX=(t.clientX-u.left)/this.canvas.clientWidth*320|0,this.mouseY=(t.clientY-u.top)/this.canvas.clientHeight*240|0,this.mouseButtonDown=!1}),this.addEventListener("mouseleave",t=>{var u=this.canvas.getBoundingClientRect();this.mouseX=(t.clientX-u.left)/this.canvas.clientWidth*320|0,this.mouseY=(t.clientY-u.top)/this.canvas.clientHeight*240|0,this.mouseButtonDown=!1});let a=(t,u)=>{let s=Ot(u);switch(t){case 0:return this.pause(),this.debugSyscallHit=!0,0;case 1:let U=s.popUint();Ht(s.memoryPtr()+U,this.rgbaFramePtr,320*240);let E=new Uint8ClampedArray($().buffer,this.rgbaFramePtr,320*240*4),T=new ImageData(E,320,240);return this.canvas.getContext("2d").putImageData(T,0,0),this.vsyncHit=!0,0;case 2:{let g="";for(;;){let w=s.popUint();if(w==6)break;switch(w){case 0:g+=s.popInt();break;case 1:g+="0x"+s.popInt().toString(16);break;case 2:g+=s.popFloat();break;case 3:let L=s.popUint();g+=Ft($(),s.memoryPtr()+L);break;case 4:g+=" ";break;case 5:g+=`
`;break;default:break}}return console.log(g),-1}case 3:return s.pushInt(this.mouseX),s.pushInt(this.mouseY),s.pushInt(this.mouseButtonDown?-1:0),-1;case 4:case 5:return s.pushFloat(performance.now()/1e3),-1}};this.syscallHandlerPtr=Ct(a,"iii")}addEventListener(e,a){this.canvas.addEventListener(e,a),this.listeners.push({type:e,listener:a})}dipose(){this.stop();for(let e=0;e<this.listeners.length;e++){let a=this.listeners[e];this.canvas.removeEventListener(a.type,a.listener)}Mt(this.rgbaFramePtr)}setLogLevel(e){this.logLevel=e}setStateChangeListener(e){this.stateChangeListener=e}setBreakpoints(e){this.breakpoints=e,this.bpPtr!=0&&(Mt(this.bpPtr),this.bpPtr=0,this.numBps=0),this.state!=0&&this.calculateBreakpoints()}calculateBreakpoints(){if(this.bpPtr!=0)return this.bpPtr;let e=this.vm.program().addressToLine(),a=this.bpPtr=Vt(4*this.breakpoints.length);for(let t=0;t<this.breakpoints.length;t++){let u=this.breakpoints[t];for(let s=0;s<e.length;s++)if(e[s]==u){Et(a,s*4),a+=4,this.numBps++;break}}return this.bpPtr}run(e){if(this.compilerResult&&(this.compilerResult.free(),this.compilerResult=null),this.vm&&(this.vm.free(),this.vm=null),this.compilerResult=Pt(e),this.compilerResult.error.isSet()){alert("Can't run program with errors."),this.compilerResult.error.print(),this.compilerResult.free(),this.stateChangeListener&&this.stateChangeListener(this,this.state);return}this.vm=Ce(this.compilerResult.program);for(let a=0;a<=255;a++)this.vm.setSyscall(a,this.syscallHandlerPtr);this.vmStart=performance.now(),this.executedInstructions=0,this.lastStepHitBreakpoint=!1,this.state=1,this.stateChangeListener&&this.stateChangeListener(this,this.state),requestAnimationFrame(()=>this.frame())}stop(){this.state!=1&&this.state!=2||(this.state=0,this.stateChangeListener&&this.stateChangeListener(this,this.state),this.printVmTime(),this.printVmState())}pause(){this.state==1&&(this.state=2,this.stateChangeListener&&this.stateChangeListener(this,this.state),this.printVmState())}continue(){this.state==2&&(this.state=1,this.stateChangeListener&&this.stateChangeListener(this,this.state),this.printVmState(),requestAnimationFrame(()=>this.frame()))}step(){if(this.state==2){if(!this.vm.step())if(this.vsyncHit||this.debugSyscallHit)this.vsyncHit=!1,this.debugSyscallHit=!1;else{this.state=0,this.stateChangeListener&&this.stateChangeListener(this,this.state);return}this.stateChangeListener&&this.stateChangeListener(this,this.state),this.printVmState()}}getCurrentLine(){if(this.state!=2)return-1;let e=this.vm.registers()[14].ui()>>2,a=this.vm.program().addressToLine();return e>=a.length?-1:a[e]}getState(){return this.state}getRegisters(){return this.vm.registers()}getProgram(){return this.vm.program()}getInt(e){return x(this.vm.memoryPtr()+e)}getFloat(e){return Lt(this.vm.memoryPtr()+e)}printVmTime(){if(this.logLevel==0)return;let e=(performance.now()-this.vmStart)/1e3;console.log("VM took "+e+" secs"),console.log("Executed "+this.executedInstructions+" instructions, "+(this.executedInstructions/e|0)+" ins/s")}printVmState(){this.logLevel!=0&&this.vm.print()}getCanvas(){return this.canvas}frame(){if(this.state==1){let e=performance.now();const a=2e4;if(this.lastStepHitBreakpoint&&(this.lastStepHitBreakpoint=!1,!this.vm.step())){if(this.vsyncHit||this.debugSyscallHit){this.vsyncHit=!1,this.debugSyscallHit=!1,requestAnimationFrame(()=>this.frame());return}this.state=0,this.stateChangeListener&&this.stateChangeListener(this,this.state),this.printVmTime(),this.printVmState();return}for(;;){this.executedInstructions+=a;let t=0;if(this.breakpoints.length>0&&this.calculateBreakpoints(),this.numBps>0){if(t=this.vm.stepNBP(a,this.bpPtr,this.numBps),t>=1){this.lastStepHitBreakpoint=!0,this.state=2,this.stateChangeListener&&this.stateChangeListener(this,this.state),this.printVmState();return}}else t=this.vm.stepN(a);if(!t){if(this.vsyncHit||this.debugSyscallHit){this.vsyncHit=!1,this.debugSyscallHit=!1,requestAnimationFrame(()=>this.frame());return}this.state=0,this.stateChangeListener&&this.stateChangeListener(this,this.state),this.printVmTime(),this.printVmState();return}if(performance.now()-e>16){requestAnimationFrame(()=>this.frame());return}}}}},Yt=!1;function jt(){return z(this,null,function*(){Yt||(Yt=!0,yield de())})}function Fe(e,a){return z(this,null,function*(){yield jt();let t=yield fetch(`https:/api.github.com/gists/${a}`);if(t.status>=400)throw new Error(`Couldn't fetch gist ${a}`);let u=yield t.json();if(!u.files||!u.files["source.ul"]||!u.files["source.ul"].content)throw new Error("Gist ${gistId} is not a ulang program.");return new qt(e,u.files["source.ul"].content)})}var qt=class{constructor(e,a){this.vm=new Xt(e),this.source=a}play(){this.vm.run(this.source)}getVirtualMachine(){return this.vm}getSource(){return this.source}dispose(){this.vm&&this.vm.dipose()}};return he(st)})();